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Finding the Third Proportional to 641,387 and 1,392,070

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Solution

The third proportional to 641,387 and 1,392,070 is: 3,021,356.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,387 : 1,392,070 = 1,392,070 : x
  2. Step 2: Convert to fraction form
    641,387/1,392,070 = 1,392,070/x
  3. Step 3: Cross multiply
    641,387x = 1,392,070 × 1,392,070
  4. Step 4: Simplify right side
    641,387x = 1,937,858,884,900
  5. Step 5: Solve for x
    x = 1,937,858,884,900/641,387
  6. Step 6: Final answer
    x = 3,021,356.66

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.